UIAlertController文本对齐 [英] UIAlertController text alignment

问题描述

有没有办法在iOS 8上更改UIAlertController内显示的消息的对齐方式？

Is there a way to change the alignment of the message displayed inside a UIAlertController on iOS 8?

我认为访问子视图并为UILabel更改它不是可能了。

I believe accessing the subviews and changing it for the UILabel is not possible anymore.

推荐答案

我已成功使用以下内容，用于对齐和设计UIAlertControllers的文本：

I have successfully used the following, for both aligning and styling the text of UIAlertControllers:

let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = NSTextAlignment.Left

let messageText = NSMutableAttributedString(
    string: "The message you want to display",
    attributes: [
        NSParagraphStyleAttributeName: paragraphStyle,
        NSFontAttributeName : UIFont.preferredFontForTextStyle(UIFontTextStyleBody),
        NSForegroundColorAttributeName : UIColor.blackColor()
    ]
)

myAlert.setValue(messageText, forKey: "attributedMessage")

你可以用t做类似的事情itle，如果你使用attributionTitle，而不是attributionMessage

You can do a similar thing with the title, if you use "attributedTitle", instead of "attributedMessage"

以上内容仍适用于Swift 3，但代码必须略微修改为：

The above still works in Swift 3, but the code has to be slightly altered to this:

let messageText = NSMutableAttributedString(
    string: "The message you want to display",
    attributes: [
        NSParagraphStyleAttributeName: paragraphStyle,
        NSFontAttributeName : UIFont.preferredFont(forTextStyle: UIFontTextStyle.body),
        NSForegroundColorAttributeName : UIColor.black
    ]
)

myAlert.setValue(messageText, forKey: "attributedMessage")

Swift 4 update

Swift 4 update

let messageText = NSMutableAttributedString(
    string: "The message you want to display",
    attributes: [
        NSAttributedStringKey.paragraphStyle: paragraphStyle,
        NSAttributedStringKey.font: UIFont.preferredFont(forTextStyle: UIFontTextStyle.body),
        NSAttributedStringKey.foregroundColor: UIColor.black
    ]
)

myAlert.setValue(messageText, forKey: "attributedMessage")

这篇关于UIAlertController文本对齐的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！